Search for dissertations about: "vascular plant"

Showing result 11 - 15 of 75 swedish dissertations containing the words vascular plant.

  2. 11. Interactions between gray-sided voles (Clethrionomys rufocanus) and vegetation in the Fennoscandian tundra

    Author : Jonas Dahlgren; Lauri Oksanen; Johan Olofsson; John Terborgh; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; gray-sided voles; tundra vegetation; trophic cascades; plant-herbivore interactions; bilberry; plant communities; herbivory; plant resistance; Terrestrial ecology; Terrestisk ekologi;

    Abstract : I have, in this thesis, studied the interactions between gray-sided voles (Clethrionomys rufocanus) and tundra vegetation, on islands in, and mainland sites close to the lake Iešjávri, in northern Norway. As isolated islands are virtually free of predation, I have been able to compare plant-herbivore interactions in the presence and absence of predators. READ MORE

  4. 12. A study of the molecular pathways of wood formation using peptide mass spectrometry

    Author : Robert Nilsson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Wood consists essentially of secondary plant cell walls, composed of a cellulose and hemicellulose network impregnated with lignin. It is formed via the development of derivatives of a thin layer of cells (the vascular cambium) into xylem cells through cell division, expansion, secondary wall formation, lignification and, finally, programmed cell death. READ MORE

  5. 13. Plant community assembly during succession from arable fields to semi-natural grassland

    Author : Barbara Christine Schmid; Biodiversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; diversity; arable-to-grassland succession; space-for-time approach; land-use history; plant community assembly; grazing management; connectivity measures; dispersal vector; vascular plants; grassland specialist conservation;

    Abstract : Large areas of grazed, species rich semi-natural grassland were lost in Europe during the last two centuries and as a consequence led to decreases in grassland specialist species. Therefore, today the “restoration” of grassland on previously arable fields is recommended for the protection of grassland specialists. READ MORE

  6. 14. Cellular Control and Physiological Importance of Vascular Lignification

    Author : Leonard Blaschek; Edouard Pesquet; Richard Sibout; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; växtfysiologi; Plant Physiology;

    Abstract : Lignin is indispensable for vascular plants. It allows their cells to coalesce into gravity-defying giants, hardens them to withstand pressures and predators, and waterproofs them to allow the flow of water only where it is advantageous. READ MORE

  7. 15. The effect of stress on plant vascular development and regeneration

    Author : Shamik Mazumdar; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Plants are susceptible to stress due to their lifestyle and as such have evolved multiple adaptive strategies to ensure survival. One of the most remarkable abilities in plants is their competence to regenerate tissues. Particularly, any damage to vascular tissues is healed quickly to continue survival. READ MORE